Friday

September 30, 2016
Total # Posts: 3,299

**Math**

A maple tree casts a shadow of 45 ft long. At the same time, a 40-ft-long oak tree casts a shadow which is 60 ft long. Explain how you can use similar triangles to find the height of the tree. Then find the height of the tree.

*May 23, 2013*

**math**

the angle of depresssion from the top of a building to a point on the ground is 59 degrees. how far is the point on the ground from the top of the building if the building is 87 meters high?

*May 21, 2013*

**Math-HELP PLEEEEAAASE**

Thank you.

*May 20, 2013*

**Math-HELP PLEEEEAAASE**

The volume of a cuboid is 1200cm^3, if the length is 20 cm, give two other pair of values that could be used for its width and height.

*May 20, 2013*

**Sociology of Sports**

# 8 IS A.

*May 18, 2013*

**Sociology of Sports**

Please Help these are the last of the questions I need Help with.... Which of the following is NOT one of the reasons why women are under represented in coaching and administrative positions in sports? (C) A. Men are more likely than women to be seen as qualified for these ...

*May 18, 2013*

**Sociology of Sports**

Thanks Ms.Sue... I'll go with your answers...

*May 18, 2013*

**Sociology of Sports**

Thanks Ms.Sue, I am not to sure about 1& 2 from what i have read they seem to be the correct answers but maybe i am not comprehending it correctly. I don't know

*May 18, 2013*

**Sociology of Sports **

Would Someone PLEASE HELP? 1.Deviant overconformity is associated with some forms of violence in sports. The roots of this violence are grounded in (d) A. a desire for self-fulfillment and personal satisfaction. B.a lack of loyalty to team rules. C.the desire to gain ...

*May 18, 2013*

**Math130 HELP**

5/2=2.5 2.5+.7=3.20 2.5-.7=1.8 Compass cost $3.20 Ruler cost $1.80

*May 16, 2013*

**Biology**

I need help in tying 3 things from: cellular respiration, energy transfer, osmosis, ATP to the water cycle

*May 16, 2013*

**Macroeconomics**

If Mary takes money from her savings account and buys a T-bond from Jody with that money, it's: A. An example of expansionary monetary policy. B. An example of contractionary monetary policy. C. An example of neutral (neither expansionary nor contractionary) policy. D. The...

*May 11, 2013*

**physics HELP!!**

An object is moving along a straight line, and the uncertainty in its position is 2.40 m. (a) Find the minimum uncertainty in the momentum of the object. Find the minimum uncertainty in the object's velocity, assuming that the object is (b) a golf ball (mass = 0.0450 kg) ...

*May 7, 2013*

**physics**

An object is moving along a straight line, and the uncertainty in its position is 2.40 m. (a) Find the minimum uncertainty in the momentum of the object. Find the minimum uncertainty in the object's velocity, assuming that the object is (b) a golf ball (mass = 0.0450 kg) ...

*May 7, 2013*

**physics!**

Late one night on a highway, a car speeds by you and fades into the distance. Under these conditions the pupils of your eyes have diameters of about 7.0 mm. The taillights of this car are separated by a distance of 1.2 m and emit red light (wavelength = 669 nm in vacuum). How ...

*May 7, 2013*

**physics**

Two stars are 2.4 × 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.72 m and just detects these stars as separate objects. Assume that light of wavelength 590 nm is being observed. Also, assume that diffraction ...

*May 7, 2013*

**PHYSICS**

Two parallel slits are illuminated by light composed of two wavelengths. One wavelength is λA = 553nm. The other wavelength is λB and is unknown. On a viewing screen, the light with wavelength λA = 553nm produces its third-order bright fringe at the same place ...

*May 7, 2013*

**PHYSICS**

In the lungs there are tiny sacs of air, which are called alveoli. An oxygen molecule (mass = 5.30 × 10-26 kg) is trapped within a sac, and the uncertainty in its position is 0.120 mm. What is the minimum uncertainty in the velocity of this oxygen molecule?

*May 7, 2013*

**Math**

8943854

*May 6, 2013*

**math**

find the amount due on a $300 invoice recieved on june 3 and paid on june 11 if the sales terms are 3/15, n/30

*May 3, 2013*

**algebra**

A sick Chuter Just Barge In

*May 2, 2013*

**chemistry**

the density of mercury is 13.6 g/cm3. how many liters are in 829 grams of Hg.

*May 1, 2013*

**Life Orientation**

Hi I am a matric learner and I am having trouble with an lo portfolio assignment. it is about environmental issues and im stuck. I need to identify and describe 3 environmental health hazards that cause ill health, accidents, crisis and disasters within my community or any ...

*May 1, 2013*

**Math**

List all potential rational zeros of 9x^3+6x^2-29x-10

*April 30, 2013*

**chemistry**

Al2(SO4)3+6KOH-->2Al(OH)3+3K2SO4 a)How many grams of potassium hydroxide are needed to completely react with 870 mg of aluminum sulfate? b)If you want to make 7.00 grams of potassium sulfate, how many grams of aluminum sulfate would you need to react? c)How many grams of ...

*April 29, 2013*

**Math**

A multiple choice quiz contains five question. Each question has four answer choices. Michael is not prepared for the quiz and decides to guess for each question. What is the probability that Michael will get at least one question correct? What is the probability that Micheal ...

*April 29, 2013*

**Eng B**

B - Weaves exciting action around a standard formula C - Contains or suggests universal truths refers to today's hot topics

*April 29, 2013*

**english.**

4. b

*April 28, 2013*

**english.**

3. d

*April 28, 2013*

**english.**

Is one C?

*April 28, 2013*

**english.**

1 D. 2 D. 3 C. 4 c.

*April 28, 2013*

**english. **

1. Read the following stanza from “Alone”: Lying, thinking Last night How to find my soul a home Where water is not thirsty And bread loaf is not stone I came up with one thing And I don’t believe I’m wrong That nobody, But nobody Can make it out here alone...

*April 28, 2013*

**Herndon High**

cos15°cos30°- sin15°sin30° =

*April 27, 2013*

**Algebra**

{5x-4y=-21} {-2x+4y=18}

*April 25, 2013*

**Math **

I can't remember how to do simplifying algebraic expressions can anyone help me?

*April 25, 2013*

**chemisrty**

A 21.00 sample of 0.3254M Hcl solution requires 26.09 ml of NaOH solution for complete neutralization. Calculate the volume of NaOH solution in liters, required for the titration.

*April 25, 2013*

**math**

Write five million two hundred eighty in standard form

*April 23, 2013*

**physics**

800+x-1300-400=0 800+x-1700=0 x=900

*April 21, 2013*

**Algebra**

Given the following piecewise function f(x)= {-x+1 for x < 0 {-1 for 0 ≤ x ≤ 3 {-2x for x > 3 a) Find the domain b) Find the range c) Find the intercepts d) Is f continuous on its domain? If not, state where f is discontinuous. e) Graph the function

*April 19, 2013*

**Chemistry**

Write the balanced chemical equation for reaction the following chemical reaction ozone gas , O3 , reacts with 2,3,4,5-tetramethylheptane, CH3-CH(CH3)-CH(CH3)-CH(CH3)-CH(CH3)-CH2-CH3 , to produce carbon dioxide gas, CO2 , and water vapor, H2O

*April 18, 2013*

**probability**

A company manufactured 1, 000 televisions. Testing showed that 20 of the televisons were defective. What is the experimental probability that the next television will be defective?

*April 18, 2013*

**Chemistry**

What is the equation for the reaction of potassium soap with HCL?

*April 18, 2013*

**Chemistry**

In saponification, does sudsing show after adding acid. Why?

*April 18, 2013*

**Got it right **

:0

*April 17, 2013*

**Calculus**

Find two positive numbers whose sum is 8 such hat when the cube of th first number is multiplied by the second number, the result is maximum.

*April 16, 2013*

**Chemistry**

Give the equation for the base hydrolysis of methyl benzoate by KOH. What are the 2 types of molecules being formed in this reaction?

*April 15, 2013*

**Chemistry**

If the molecule triglyceride underwent base hydrolysis, what 4 products would you obtain? Give the condensed formulas.

*April 15, 2013*

**Trig**

Solve the multiple-angle equation. (Enter your answers as a comma-separated list. Let n be any integer. Enter your response in radians.) sec 9x = 2

*April 15, 2013*

**Chemistry**

A balloon contains 2000mL of helium gas at 300K what is the new volume in mL at 600K

*April 15, 2013*

**Math**

Ok, thank you.

*April 15, 2013*

**Math**

x^2(3-x)=k. That's the equation.

*April 15, 2013*

**Math**

Given that the equation x^2(3-x) has 3 real solutions of k, give the set of possible values for k.

*April 15, 2013*

**anthropology**

Chiefdoms are characterized by all of the following except

*April 14, 2013*

**Chemistry**

How many grams of NaF should be added to 612 ml of 0.4 M HF (Ka = 6.8 x 10-4) to produce a buffer solution where pH = 3.10?

*April 12, 2013*

**problem solving**

ou are completing the final exam in your class. Your instructor’s assignment instructions state that you may only use the following resources: library books, class notes, texts, and the instructor. You and your roommate discussed one of the questions, but you wrote your ...

*April 12, 2013*

**Chemistry **

How much energy would be released when 675 grams of steam is condensed to water

*April 11, 2013*

**place vowlue**

2 tens and333 hundreds

*April 10, 2013*

**Math**

3+3+4+4=14 feet for each window,3 feet wide and 4 feet high.You have 5 windows so what is 5x14?

*April 9, 2013*

**Algebra**

Given f(x)=-4+lnx; Find the inverse of f. f^-1=?

*April 7, 2013*

**Math**

a curve is such that dy/dx=4x+7. the line y=2x meets the curve at point 'P'. Given that the gradient of the curve at P is 5. State the coordinates of P.

*April 7, 2013*

**math**

ONE-NINTH

*April 7, 2013*

**math**

1rad=180/pi degrees. so 174=f degrees. cross multiply and get f=174 x 180/pi. where f represents the unknown degrees.

*April 7, 2013*

**MATH**

Complete the square method.

*April 7, 2013*

**MATH**

ok, divide throughout by logv3 and then you will get a quadratic equation and solve for t.

*April 7, 2013*

**MATH**

remember to divide the terms when subtracting in logarithms.

*April 7, 2013*

**science asap**

altitude on the horizontal axis and pressure on vertical because the independent variable always goes on the horizontal axis, and in this case pressure changes depending on the altitude.

*April 7, 2013*

**math**

What does a lower perfect square and a upper perfect square mean.

*April 7, 2013*

**Math**

a curve is such that dy/dx=4x+7. the line y=2x meets the curve at point 'P'. Given that the gradient of the curve at P is 5. State the coordinates of P.

*April 7, 2013*

**Pre-Algebra**

6,7,8

*April 7, 2013*

**Math**

Yeah it's 1. 22-12-9=1

*April 7, 2013*

**Math**

No it is not.

*April 7, 2013*

**math**

Write the slope Intercept form of the depletion of the line that contains -4,6 and 6,-1

*April 6, 2013*

**Philosphy**

what is the role of the agent intellect? I know it illuminates and then abstracts the phantasm, but not really understanding completely..thank you

*April 6, 2013*

**geometry**

LMNO is a parallelogram. If NM = x + 15 and OL = 3x + 5, find the value of x, then find NM and OL

*April 5, 2013*

**Chemistry**

How do i calculate the number of moles of mg in 0.303 reacted

*April 4, 2013*

**Analytical chemistry**

A 25.0-mL solution of 0.0660 M EDTA was added to a 33.0-mL sample containing an unknown concentration of V3 . All V3 present formed a complex, leaving excess EDTA in solution. This solution was back-titrated with a 0.0450 M Ga3 solution until all the EDTA reacted, requiring 13...

*April 4, 2013*

**Analytical chemistry**

Calculate pCd2 at each of the following points in the titration of 40.00 mL of 0.0040 M Cd2 with 0.0040 M EDTA in the presence of the auxiliary complexing agent NH3. The solution is buffered at a pH of 11.00. Take the NH3 concentration to be a constant 0.100 M. The formation ...

*April 4, 2013*

**chemistry**

A 50.00-mL sample of groundwater is titrated with 0.0900 M EDTA. Assume that Ca2 accounts for all of the hardness in the groundwater. If 11.40 mL of EDTA is required to titrate the 50.00-mL sample, what is the hardness of the groundwater in molarity and in parts per million of...

*April 4, 2013*

**chemistry**

The concentration of saturated NaOH is 50.0% w/w and the density is 1.52 g/mL. If exactly 8.50 mL were diluted to 1.000 L, what would be the concentration?

*April 4, 2013*

**chemistry**

A solution of the primary standard potassium hydrogen phthalate, KHC8H4O4, was prepared by dissolving 0.4877 g of potassium hydrogen phthalate in about 50 mL of water. Titration with a KOH solution required 17.65 mL to reach a phenolphthalein end point. What is the molarity of...

*April 4, 2013*

**Analytical chemistry**

A 24.393 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 80.601 g of water. A 12.404 g aliquot of this solution is then titrated with 0.1059 M HCl. It required 31.61 mL of the HCl solution to reach the methyl red ...

*April 4, 2013*

**chemistry**

The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.4. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.75 M B(aq) with 0.75 M HCl(aq). (b) after addition of 25.0 mL of HCl (c) after addition of 50.0 mL of HCl (d) after addition...

*April 4, 2013*

**chemistry**

0.650 L of 0.420 M H2SO4 is mixed with 0.600 L of 0.280 M KOH. What concentration of sulfuric acid remains after neutralization?

*April 4, 2013*

**Chemistry**

Of the 3 types of fat, which type of fat would react with the greatest amount of bromine? Least amount of bromine? a. saturated fat b. mono-unsaturated fat c. poly-unsaturated fat

*April 2, 2013*

**physics**

block 1 has mass m1 = 480 g, block 2 has mass m2 = 540 g, and the pulley is on a frictionless horizontal axle and has radius R = 5.2 cm. When released from rest, block 2 falls 76 cm in 5.2 s (without the cord slipping on the pulley). What is the pulley's rotational inertia...

*April 2, 2013*

**physics**

The average rate at which energy is conducted outward through the ground surface in a certain region is 66.8 mW/m2, and the average thermal conductivity of the near-surface rocks is 2.13 W/m·K. Assuming a surface temperature of 8.01°C, find the temperature (in ...

*April 1, 2013*

**physics**

In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. Assume that ...

*April 1, 2013*

**Statistics**

A) 0.153 B) 0.753 C) 0.095

*March 30, 2013*

**Philosophy**

Show that (P → Q) ↔ (¬P ∨ Q) in fitch

*March 29, 2013*

**Math**

thanks

*March 28, 2013*

**Math**

What is 9/20 in simplest form?

*March 28, 2013*

**french**

I need to complete activity 11 noms et prenoms with the verb appeler, it's French 3 in the la routine quotidienne packet?

*March 27, 2013*

**Chemistry 140A**

A gas cylinder containing 6.38 mol of neon has a pressure of 491 mm Hg at 295 K. If 3.22 mol of helium is added to this cylinder, at constant temperature and volume, what will be the pressure in the cylinder?

*March 26, 2013*

**Form a polynomial f(x)**

Form a polynomial f(x) with the real coefficients having the given degree and zeros. Degree 5; Zeros: -3; -i; -6+i f(x)=a( )

*March 26, 2013*

**College algebra**

Form a polynomial f(x) with the real coefficients having the given degree and zeros. Degree 5; Zeros: -3; -i; -6+i f(x)=a( )

*March 26, 2013*

**Find the complex zeros**

Find the complex zeros of the polynomial function. Write f in the factored form. f(x)=x^3-3x^2+7x-5 f(x)=

*March 26, 2013*

**Use the intermediate value**

Use the intermediate value theorem to show that the polynomial function has a zero in the given interval. f(x)=4x^3+6x^2-7x+1; [-4,-2] f(-4)=

*March 26, 2013*

**math **

I need help with these two problems please. Completely factor the polynomial. 8x^3+16^2+8x+16 Factor the trinomial completely. y^3-14y^2+48y

*March 24, 2013*

**Science**

Which would you measure in millimeters , a capacity of a juice box or the capacity of a water pitcher?

*March 23, 2013*

**quantitative chemistry**

Na2HAsO4 neutral compound

*March 22, 2013*